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. 2017 Aug 23;12(8):e0183730. doi: 10.1371/journal.pone.0183730

Fig 1. Calcium and PTH concentration in haemodialysis patients.

Fig 1

(A) Plasma calcium concentration in pre- and post-haemodialysis samples (n = 68). The Wilcoxon matched pairs test was used for statistical analysis. (B) Scatter graph displaying a significant (p < 0.001) correlation between ΔCalcium (ΔCa, the difference between post- and pre-haemodialysis calcium concentration) and ΔPTH (the difference between post- and pre-haemodialysis PTH concentration). (C) ΔPTH based on ΔCalcium (ΔCa ≤0 or ΔCa >0 mmol/L). The Mann-Whitney test was used for statistical analysis. **p < 0.01; ***p < 0.001. PreHD, pre-haemodialysis; PostHD, post-haemodialysis.